git-gui/lib/merge.tcl

   1 # git-gui branch merge support
   2 # Copyright (C) 2006, 2007 Shawn Pearce
   3
   4 class merge {
   5
   6 field w         ; # top level window
   7 field w_rev     ; # mega-widget to pick the revision to merge
   8
   9 method _can_merge {} {
  10         global HEAD commit_type file_states
  11
  12         if {[string match amend* $commit_type]} {
  13                 info_popup [mc "Cannot merge while amending.
  14
  15 You must finish amending this commit before starting any type of merge.
  16 "]
  17                 return 0
  18         }
  19
  20         if {[committer_ident] eq {}} {return 0}
  21         if {![lock_index merge]} {return 0}
  22
  23         # -- Our in memory state should match the repository.
  24         #
  25         repository_state curType curHEAD curMERGE_HEAD
  26         if {$commit_type ne $curType || $HEAD ne $curHEAD} {
  27                 info_popup [mc "Last scanned state does not match repository state.
  28
  29 Another Git program has modified this repository since the last scan.  A rescan must be performed before a merge can be performed.
  30
  31 The rescan will be automatically started now.
  32 "]
  33                 unlock_index
  34                 rescan ui_ready
  35                 return 0
  36         }
  37
  38         foreach path [array names file_states] {
  39                 switch -glob -- [lindex $file_states($path) 0] {
  40                 _O {
  41                         continue; # and pray it works!
  42                 }
  43                 _U -
  44                 U? {
  45                         error_popup [mc "You are in the middle of a conflicted merge.
  46
  47 File %s has merge conflicts.
  48
  49 You must resolve them, stage the file, and commit to complete the current merge.  Only then can you begin another merge.
  50 " [short_path $path]]
  51                         unlock_index
  52                         return 0
  53                 }
  54                 ?? {
  55                         error_popup [mc "You are in the middle of a change.
  56
  57 File %s is modified.
  58
  59 You should complete the current commit before starting a merge.  Doing so will help you abort a failed merge, should the need arise.
  60 " [short_path $path]]
  61                         unlock_index
  62                         return 0
  63                 }
  64                 }
  65         }
  66
  67         return 1
  68 }
  69
  70 method _rev {} {
  71         if {[catch {$w_rev commit_or_die}]} {
  72                 return {}
  73         }
  74         return [$w_rev get]
  75 }
  76
  77 method _visualize {} {
  78         set rev [_rev $this]
  79         if {$rev ne {}} {
  80                 do_gitk [list $rev --not HEAD]
  81         }
  82 }
  83
  84 method _start {} {
  85         global HEAD current_branch remote_url
  86         global _last_merged_branch
  87
  88         set name [_rev $this]
  89         if {$name eq {}} {
  90                 return
  91         }
  92
  93         set spec [$w_rev get_tracking_branch]
  94         set cmit [$w_rev get_commit]
  95
  96         set fh [open [gitdir FETCH_HEAD] w]
  97         fconfigure $fh -translation lf
  98         if {$spec eq {}} {
  99                 set remote .
 100                 set branch $name
 101                 set stitle $branch
 102         } else {
 103                 set remote $remote_url([lindex $spec 1])
 104                 if {[regexp {^[^:@]*@[^:]*:/} $remote]} {
 105                         regsub {^[^:@]*@} $remote {} remote
 106                 }
 107                 set branch [lindex $spec 2]
 108                 set stitle [mc "%s of %s" $branch $remote]
 109         }
 110         regsub ^refs/heads/ $branch {} branch
 111         puts $fh "$cmit\t\tbranch '$branch' of $remote"
 112         close $fh
 113         set _last_merged_branch $branch
 114
 115         set cmd [list git]
 116         lappend cmd merge
 117         lappend cmd --strategy=recursive
 118         lappend cmd [git fmt-merge-msg <[gitdir FETCH_HEAD]]
 119         lappend cmd HEAD
 120         lappend cmd $name
 121
 122         ui_status [mc "Merging %s and %s..." $current_branch $stitle]
 123         set cons [console::new [mc "Merge"] "merge $stitle"]
 124         console::exec $cons $cmd [cb _finish $cons]
 125
 126         wm protocol $w WM_DELETE_WINDOW {}
 127         destroy $w
 128 }
 129
 130 method _finish {cons ok} {
 131         console::done $cons $ok
 132         if {$ok} {
 133                 set msg [mc "Merge completed successfully."]
 134         } else {
 135                 set msg [mc "Merge failed.  Conflict resolution is required."]
 136         }
 137         unlock_index
 138         rescan [list ui_status $msg]
 139         delete_this
 140 }
 141
 142 constructor dialog {} {
 143         global current_branch
 144         global M1B use_ttk NS
 145
 146         if {![_can_merge $this]} {
 147                 delete_this
 148                 return
 149         }
 150
 151         make_dialog top w
 152         wm title $top [append "[appname] ([reponame]): " [mc "Merge"]]
 153         if {$top ne {.}} {
 154                 wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 155         }
 156
 157         set _start [cb _start]
 158
 159         ${NS}::label $w.header \
 160                 -text [mc "Merge Into %s" $current_branch] \
 161                 -font font_uibold
 162         pack $w.header -side top -fill x
 163
 164         ${NS}::frame $w.buttons
 165         ${NS}::button $w.buttons.visualize \
 166                 -text [mc Visualize] \
 167                 -command [cb _visualize]
 168         pack $w.buttons.visualize -side left
 169         ${NS}::button $w.buttons.merge \
 170                 -text [mc Merge] \
 171                 -command $_start
 172         pack $w.buttons.merge -side right
 173         ${NS}::button $w.buttons.cancel \
 174                 -text [mc "Cancel"] \
 175                 -command [cb _cancel]
 176         pack $w.buttons.cancel -side right -padx 5
 177         pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 178
 179         set w_rev [::choose_rev::new_unmerged $w.rev [mc "Revision To Merge"]]
 180         pack $w.rev -anchor nw -fill both -expand 1 -pady 5 -padx 5
 181
 182         bind $w <$M1B-Key-Return> $_start
 183         bind $w <Key-Return> $_start
 184         bind $w <Key-Escape> [cb _cancel]
 185         wm protocol $w WM_DELETE_WINDOW [cb _cancel]
 186
 187         bind $w.buttons.merge <Visibility> [cb _visible]
 188         tkwait window $w
 189 }
 190
 191 method _visible {} {
 192         grab $w
 193         if {[is_config_true gui.matchtrackingbranch]} {
 194                 $w_rev pick_tracking_branch
 195         }
 196         $w_rev focus_filter
 197 }
 198
 199 method _cancel {} {
 200         wm protocol $w WM_DELETE_WINDOW {}
 201         unlock_index
 202         destroy $w
 203         delete_this
 204 }
 205
 206 }
 207
 208 namespace eval merge {
 209
 210 proc reset_hard {} {
 211         global HEAD commit_type file_states
 212
 213         if {[string match amend* $commit_type]} {
 214                 info_popup [mc "Cannot abort while amending.
 215
 216 You must finish amending this commit.
 217 "]
 218                 return
 219         }
 220
 221         if {![lock_index abort]} return
 222
 223         if {[string match *merge* $commit_type]} {
 224                 set op_question [mc "Abort merge?
 225
 226 Aborting the current merge will cause *ALL* uncommitted changes to be lost.
 227
 228 Continue with aborting the current merge?"]
 229         } else {
 230                 set op_question [mc "Reset changes?
 231
 232 Resetting the changes will cause *ALL* uncommitted changes to be lost.
 233
 234 Continue with resetting the current changes?"]
 235         }
 236
 237         if {[ask_popup $op_question] eq {yes}} {
 238                 set fd [git_read --stderr read-tree --reset -u -v HEAD]
 239                 fconfigure $fd -blocking 0 -translation binary
 240                 fileevent $fd readable [namespace code [list _reset_wait $fd]]
 241                 $::main_status start [mc "Aborting"] [mc "files reset"]
 242         } else {
 243                 unlock_index
 244         }
 245 }
 246
 247 proc _reset_wait {fd} {
 248         global ui_comm
 249
 250         $::main_status update_meter [read $fd]
 251
 252         fconfigure $fd -blocking 1
 253         if {[eof $fd]} {
 254                 set fail [catch {close $fd} err]
 255                 $::main_status stop
 256                 unlock_index
 257
 258                 $ui_comm delete 0.0 end
 259                 $ui_comm edit modified false
 260
 261                 catch {file delete [gitdir MERGE_HEAD]}
 262                 catch {file delete [gitdir rr-cache MERGE_RR]}
 263                 catch {file delete [gitdir MERGE_RR]}
 264                 catch {file delete [gitdir SQUASH_MSG]}
 265                 catch {file delete [gitdir MERGE_MSG]}
 266                 catch {file delete [gitdir GITGUI_MSG]}
 267
 268                 if {$fail} {
 269                         warn_popup "[mc "Abort failed."]\n\n$err"
 270                 }
 271                 rescan {ui_status [mc "Abort completed.  Ready."]}
 272         } else {
 273                 fconfigure $fd -blocking 0
 274         }
 275 }
 276
 277 }